Safety adjustable pipe stabbing board



1947- c. L. CALHOUN' v 2,425,302

SAFETY ADJUSTABLE PIPE STABBING BOARD Filed Nov. 16, 1945 Sheets-Shea lINVENTOR.

CURTIS L. CALHOUN ATTORNEYS Aug. 12, 1-947. c. L. CALHOUN SAFETYADJUSTABLE PIPE STABBING BOARD Filed Now-'16, 1945 2 Sheets-Sheet 2INVENTOR.

CURTIS L CALHOU N A'I'I'D R N EYS Patented Aug. 12, 1947 UNITED STATESPATENT OFFICE.

Curtis -L. Galhoun, Shreveport, La.

Application November 16, 1945, Serial No. 629,032-

3 Claims: 1

The invention relates to a handling board or platform, and moreespecially to an adjustable safety board or platform for handlingtubing, piping or casing material for oil wells or thelike.

The primary object of the invention is the provision of a board orplatform of this character, wherein the drill string or casing sectionsfor an oil well can be conveniently handled within the oil well derrick,either for the placing or pulling of the casings, tubing, sucker rods ordrill pipes, and without liability of injury to a workman, the board orplatform being of novel construction and unique in the arrangementthereof for the raising and lowering thereof.

Another object of the invention is the provision of a board or platformof this character, wherein its carriage is movable perpendicularly on atrack, and the board or platform through swinging action can be swungvertically from a horizontal position and is therefore safe in the usethereof, and the carriage can be latched in a selected raised or loweredposition on the track for servicing purposes.

Afurther object of the invention is the provi sion of a board orplatform of this character,- wherein the stabbing operation can becarried forth with ease and dispatch, and such platform or board isextended to a point adjacent to the axis of the well, thus giving theworkmen close approach to the work and without interference by othermechanism of the oil well rigging.

A still further object of the invention is the provision of a board orplatform of this character, which is simple in construction, thoroughlyFigure 1 is a fragmentary side elevation of an 3-3 of Figure 1, lookingin the direction'of'the" Figure 6 is 'a'sectional viewon the line" 6 6'of Figured.

Similar reference characters indicate corresponding parts throughout theseveral views in.

the drawings.

Referring to the drawings in detail, -A designates generally a portionof an oil well derrick in which is arranged the "board or platform denoted. in its entirety at B, and hereinafter fully described.

The derrick A has connected tothe girders I0, connecting its legs I2aperpendicularly disposed I-'beam' l4" forming'a track on which travelsvertically a carriage l6, having the spaced side'p-anels or cheeks I8,between which are horizontally journalled opposed upper and lowertracking rollers 20 by means of pins 22 which straddle the beam i4 andhave trackage on the base and head flanges 24 and 26 respectivelythereof, whenthe carriage I6 is moved upwardly and downwardly uponthisbeam'in the use of the board or platform.

The hanger frame 28 for the beam M which is attached in any suitablemanner to selected gird ers Illof the derrick A, has built therewith a'hoisting crane 30 which at the upper end 32' is adapted to be wound onand unwound from awindlass 36in bearing fittings on the side cheeksor'panels l8 of thecarriage Hi; the Windlass 36 being equipped with ahand crank 38 for the manual operation thereof, so that the carriage canbe raised or lowered on the beam 14, as should be obvious from thedrawings.

The carriage It at its bottom and centrally thereof has a horizontallypositioned hanger rail 40 for an adjustable telescopic connection with asquare shaped sleeve 42 secured to the board or platform 44, by means ofthe hangers 46 which are welded to the platform 44 at 48, which at thesides and ends thereof is fitted with a guard railing 50, supported bythe corner uprights 52 as stated. The bottom of the board or platform 44has the sleeve 42 secured centrally thereof which telescopically engagesover the rail 40, which together with the sleeve are of square formationin cross-section to eliminate the turning of the said sleeve thereonwhen engaged with such rail and aligned openings 53 in rail 40 andsleeve 42, receive bolts 55 to retain the sleeve in adjusted relationwith the rail. The hanger 40 is pivotally mounted between the cheeks orpanels I 8 by means of the pin 54 and is held against lowering fromhorizontal position on its pivot 54 by a stop 56, located in thecarriage l6. However said rail can swing upwardly from horizontalposition, without interference by the stop 56, when the platform orboard 44 is not to be used.

The platform 44 is further strengthened in an extended or retreadedpositions by a bar 58 one end of which is arranged to be received ineyes 60 on the platform or board 44 the other end of which is pivotallyreceived in an eye 62 on laterally extended channel arms 64 welded tothe panels 18 in diametrically opposed parallel relation with eachother. The adjustment of the platform or board 44 allows it to bebrought closer to or away from the work, a portion thereof being denotedat 66 within the derrick A, and this work in this instance is shown as apipe or well casing.

On the head flange 25 of the beam M are vertically spaced rackingprojections 68, while mounted within the carriage i4 is a springtensioned ratchet acting dog or detent 10 supported in a horizontalpivot axle 1'2, its tensioning spring being denoted at 14 and functionto normally hold the dog or detent in the path of the projections 68 forlatching engagement therewith to prevent the lowering of the carriage onthe track beam, yet permitting the said carriage to be raised by thehoisting cable 34 when the Windlass 36 therefor is manually operated,the dog being controlled by the cable 16 fastened to the platformrailing at some convenient location.

The board or platform 44 functions as a stabbing board against whichrests the work during the disconnection operation of tubing, piping,drill string, casing or the like for an oil well. The platform or board44 is usable for pulling or placing of tubing, piping, drill string,casing or the like from and in an oil well, without liability of workmento injuries 01' damage to the work.

The free end of the platform or board 44 approaches the vertical axis ofthe derrick A, where the stabbing operation is usually carried forth andassumes a horizontal position when in use, but when not in use is raisedvertically to an upright postiion out of the way.

What is claimed is:

1. A platform for an oil well derrick having horizontal girders,comprising a perpendicularly arranged I-beam forming a track securedwithin the said derrick, a carriage having traction rollers interfittingthe beam for travel of the carriage thereon, a crane rising above thebeam, a vertically swinging rail carried by the carriage, means forpreventing the swinging of the rail downwardly below a horizontal plane,a platform assembly adjustably supported on the rail, and means forlatching the carriage in a determined position vertically on the beamlaterally extended channel arms secured to the rear of said carriage,and means secured to aid arms and to said platform for aiding the railin supporting said carriage.

2. platform for an oil Well derrick having horizontal girders,comprising a perpendicularly arranged I-beam forming a track securedwithin the said derrick, a carriage having traction rollers interfittingthe beam for travel of the carriage thereon, a crane rising above thebeam, a vertically swinging rail carried by the carriage, means forpreventing the swinging of the rail downwardly below a horizontal plane,a platform assembly adjustably supported on the rail, means forlatchingthe carriage in a determined position vertically on the beam laterallyextended channel arms secured to the rear of said carriage, and meanssecured to said arms and to said platform for aiding the rail insupporting said carriage, and means for raising and lowering thecarriage on the beam.

3. A platform for an oil well derrick having horizontal girders,comprising a perpendicularly arranged I-beam forming a track securedwithin the said derrick, a carriage having traction rollers interfittingthe beam for travel of the carriage thereon, a crane rising above thebeam, a Vertically swinging rail carried by the carriage, means forpreventing the swinging of the rail downwardly below a horizontal plane,a platform assembly adjustably supported on the rail, means for latchingthe carriage in a determined position vertically on the beam laterallyextended channelarms secured to the rear of said carriage, and meanssecured to said arms and to said platform for aiding the rail insupporting said carriage, means for raising and lowering the carriage onthe beam, and a guard railing about the sides and one end of theplatform assembly,

CURTIS L. CALHOUN.

REFERENCES CITED The following references are of record in the fileofthis patent:

UNITED STATES PATENTS

